In case someone is still monitoring this post or still investigating ....
I am still getting the problem from time to time but often after a period of time, in the same session, the problem changes. No longer does the page scroll to the bottom but, instead, I have to click the back button TWICE to get back to the previous page.
After the first click, that does nothing, if I use the drop-down arrow to look at 'Recent Pages' I will see something like:
HTTP 500 Internal Server Error
or "http://www-uptime.com/icons/index"
or something to to with 'Adserver'.
The second-click then takes me back past that 'Recent Page' that is not displayed.